Activated carbon can really dehumidification
Activated carbon adsorption of small impurities in the air, including formaldehyde, benzene and so on, of course, will absorb water vapor, you can get a few hours of exposure to sunlight, and then continue to use,
Throw into the water, will be a lot of blisters, like a sponge absorbent
Activated carbon has a rich pore size, many small holes
